C Programming Exercises, Practice, Solution : Function

Last update on March 20 2025 12:33:35 (UTC/GMT +8 hours)

This resource offers a total of 60 C Function problems for practice.It includes 12 main exercises, each accompanied by solutions, detailed explanations, and four related problems.

[An Editor is available at the bottom of the page to write and execute the scripts.]

1. Simple Function Structure Variants

Write a program in C to show the simple structure of a function.

Expected Output :

The total is :  11

Click me to see the solution

2. Square Calculation Function Variants

Write a program in C to find the square of any number using the function.

Test Data :

Input any number for square : 20

Expected Output :

The square of 20 is : 400.00

Click me to see the solution

3. Swap Numbers Function Variants

Write a program in C to swap two numbers using a function.

Test Data :

Input 1st number : 2
Input 2nd number : 4

Expected Output :

Before swapping: n1 = 2, n2 = 4                                                  
After swapping: n1 = 4, n2 = 2

Click me to see the solution

4. Even/Odd Check Function Variants

Write a program in C to check if a given number is even or odd using the function.

Test Data :

Input any number : 5

Expected Output :

 The entered number is odd.

Click me to see the solution

5. Series Sum Using Function Variants

Write a program in C to find the sum of the series 1!/1+2!/2+3!/3+4!/4+5!/5 using the function.

Expected Output :

 The sum of the series is : 34

Click me to see the solution

6. Decimal to Binary Conversion Function Variants

Write a program in C to convert a decimal number to a binary number using the function.

Test Data :

Input any decimal number : 65

Expected Output :

 The Binary value is : 1000001

Click me to see the solution

7. Prime Check Function Variants

Write a program in C to check whether a number is a prime number or not using the function.

Test Data :
Input a positive number : 5
Expected Output :

The number 5 is a prime number.

Click me to see the solution

8. Largest Element in Array Function Variants

Write a program in C to get the largest element of an array using the function.

Test Data :

Input the number of elements to be stored in the array :5
Input 5 elements in the array :
element - 0 : 1
element - 1 : 2
element - 2 : 3
element - 3 : 4
element - 4 : 5

Expected Output :

The largest element in the array is : 5

Click me to see the solution

9. Armstrong & Perfect Number Function Variants

Write a program in C to check Armstrong and Perfect numbers using the function.

Test Data :

Input any number: 371

Expected Output :

 The 371 is an Armstrong number.                                                 
 The 371 is not a Perfect number.

Click me to see the solution

10. Perfect Numbers in Range Function Variants

Write a program in C to print all perfect numbers in a given range using the function.

Test Data :

Input lowest search limit of perfect numbers : 1
Input lowest search limit of perfect numbers : 100

Expected Output :

 The perfect numbers between 1 to 100 are :                                      
 6   28

Click me to see the solution

11. Anagram Check Function Variants

Write a program in C to check whether two given strings are an anagram.

Test Data :

Input the first String : spare
Input the second String : pears

Expected Output :

 spare and pears are Anagram.

Click me to see the solution

12. Max & Min Array Values Function Variants

Write a C program to find the maximum and minimum of some values using a function that returns an array.

Test Data :

Input 5 values
25
11
35
65
20

Expected Output :

Number of values you want to input: Input 5 values
Minimum value is: 11
Maximum value is: 65

Click me to see the solution

C Programming Code Editor:

More to Come !

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.